Back and seat for a chair



FIG. 1 is a top, right, front perspective view of a back and seat for a chair showing my new design;

FIG. 2 is a top, left, rear perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a rear elevational view thereof;

FIG. 6 is a left side elevational view thereof;

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom plan view thereof.

The long broken lines in the figures indicate environment that forms no part of the claimed design. The short broken lines in the figures represent stitching. 

CLAIM The ornamental design for a back and seat for a chair, as shown and described. 